Is Mg-stabilized amorphous calcium carbonate a homogeneous mixture of amorphous magnesium carbonate and amorphous calcium carbonate?

2016 ◽  
Vol 52 (77) ◽  
pp. 11527-11530 ◽  
Author(s):  
Sheng-Yu Yang ◽  
Hsun-Hui Chang ◽  
Cang-Jie Lin ◽  
Shing-Jong Huang ◽  
Jerry C. C. Chan
Keyword(s):  
Calcium Carbonate ◽  
Solid State ◽  
Solid State Nmr ◽  
Magnesium Carbonate ◽  
Homogeneous Mixture ◽  
Amorphous Calcium Carbonate ◽  
Nmr Data

13C solid-state NMR data reveal that Mg stabilized amorphous calcium carbonate might be a homogeneous mixture of nanoclusters of amorphous calcium carbonate (ACC) and amorphous magnesium carbonate (AMC).

On the Structure of Amorphous Calcium CarbonateA Detailed Study by Solid-State NMR Spectroscopy

2008 ◽  
Vol 47 (17) ◽  
pp. 7874-7879 ◽  
Author(s):  
Holger Nebel ◽  
Markus Neumann ◽  
Christian Mayer ◽  
Matthias Epple
Keyword(s):  
Calcium Carbonate ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Amorphous Calcium Carbonate ◽  
Solid State Nmr Spectroscopy

Solid State NMR as A Probe of Inorganic Materials:Examples From Glasses and Sol-Gels

2006 ◽  
Vol 984 ◽  
Author(s):  
Paul Guerry ◽  
Donna L Carroll ◽  
Phillips N Gunawidjaja ◽  
Prodipta Bhattacharya ◽  
Daniela Carta ◽  
...  
Keyword(s):  
Solid State ◽  
Phosphate Glass ◽  
Solid State Nmr ◽  
Short Range ◽  
Sol Gel ◽  
The Other ◽  
Disordered Materials ◽  
Structural Sensitivity ◽  
Nmr Data ◽  
Wide Range

AbstractTo understand amorphous and structurally disordered materials requires the application of a wide-range of advanced physical probe techniques and herein a combined methodology is outlined. The relatively short-range structural sensitivity of solid state NMR means that it is a core probe technique for characterizing such materials. The aspects of the solid state NMR contribution are emphasized here with examples given from a number of systems, with especial emphasis on the information available from 17O NMR in oxygen-containing materials. 17O NMR data for crystallization of pure sol-gel prepared oxides is compared, with new data presented from In2O3 and Sc2O3. Sol-gel formed oxide mixtures containing silica have been widely studied, but again the role and effect of the other added oxide varies widely. In a ternary ZrO2-TiO2-SiO2 silicate sol-gel the level of Q4 formation is dependent not only on the composition, as expected, but also the nature of the second added oxide. Sol-gel formed phosphates have been much less widely studied than silicates and some 31P NMR data from xerogel, sonogel and melt-quench glasses of the same composition are compared. The effect of small amounts of added antibacterial copper on phosphate glass networks is also explored.

The Effect of Additives on Amorphous Calcium Carbonate (ACC): Janus Behavior in Solution and the Solid State

2012 ◽  
Vol 23 (12) ◽  
pp. 1575-1585 ◽  
Author(s):  
Johannes Ihli ◽  
Yi-Yeoun Kim ◽  
Elizabeth H. Noel ◽  
Fiona C. Meldrum
Keyword(s):  
Calcium Carbonate ◽  
Solid State ◽  
Amorphous Calcium Carbonate ◽  
Effect Of Additives

scholarly journals Towards automatic protein backbone assignment using proton-detected 4D solid-state NMR data

2014 ◽  
Vol 60 (2-3) ◽  
pp. 85-90 ◽  
Author(s):  
ShengQi Xiang ◽  
Veniamin Chevelkov ◽  
Stefan Becker ◽  
Adam Lange
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Backbone Assignment ◽  
Protein Backbone ◽  
Nmr Data ◽  
Protein Backbone Assignment

Oxidative coupling of naphtho-9-crown-3 ether: X-ray crystal structure and solution and solid-state NMR analysis of the dimer

2001 ◽  
Vol 79 (10) ◽  
pp. 1505-1510 ◽  
Author(s):  
G W Buchanan ◽  
M F Rastegar ◽  
G PA Yap ◽  
A Moghimi ◽  
M Ghandi
Keyword(s):  
Solid State ◽  
Oxidative Coupling ◽  
Solid State Nmr ◽  
Nmr Analysis ◽  
Oxidative Dimerization ◽  
Nmr Spectrum ◽  
X Ray ◽  
Nmr Data ◽  
Group A ◽  
C Nmr

Treatment of naphtho-9-crown-3 ether with FeCl3 and aqueous H2SO4 generates bis-naphtho-9-crown-3 ether in ca. 30% yield. This compound crystallizes in the monoclinic P21/n space group; a = 9.2004(9), b = 18.0868(17), and c = 13.2078(13) Å, β = 97.799(2)° and Z = 4. 1H and 13C NMR data have been obtained in solution, and the solid-state 13C NMR spectrum is included for comparison. A chemical shift range of ca. 12 ppm has been found for the oxygenated aliphatic carbons in the solid state, in contrast to the 3 ppm range in the solution 13C NMR spectrum. These results are discussed in terms of the torsional environments of the carbon sites in the crystal structure.Key words: crown ether, stereochemistry, oxidative dimerization.

scholarly journals 1 H NMR spectra dataset and solid-state NMR data of cowpea ( Vigna unguiculata )

Data in Brief ◽  
2017 ◽  
Vol 11 ◽  
pp. 136-146 ◽  
Author(s):  
Elenilson G. Alves Filho ◽  
Lorena M.A. Silva ◽  
Elizita M. Teofilo ◽  
Flemming H. Larsen ◽  
Edy S. de Brito
Keyword(s):  
Solid State ◽  
Vigna Unguiculata ◽  
Solid State Nmr ◽  
Nmr Spectra ◽  
H Nmr ◽  
Nmr Data
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